HI. Is there a way of using the setup to display all readings in class 2 tests. Reason the same over / under results are able to be found if the test probe...is not connected. I use load to indicate a test took place. Thanks.

If you are using a Megger PAT 410, PAT 420 or PAT 450 then the data that is sent out from the tester is the same as it appears on screen.

Insulation test results that are in excess of 99 Meg Ohms are shown as >99 in the downloaded data. I have always understood this to be "out of range", or in excess of the maximum reading the tester can record, although I'm sure Megger can confirm this.

Similarly milli Amp readings less than the minimum range that the tester can measure are sent down as <0.1.

The ranges and accuracy of the tester are given in the manual of the tester.

I should say this is common for almost all the 50 or so downloading PAT tester machines that I have used over 8 or so manufacturers.

Thanks I thought that may be the case. New development.The megger 420 went down with a power supply 73 error.Thought nothing of it until It would not reset, even with fresh fuses.I was doing a standard class 1 test on a bench grinder at the time, about 330VA.AVO the suppliers commented it could be a new power supply. I thought however these machines should be pretty well protected and robust. It starts up but does not gothrough to the sign in part, stalls, shows error and waits with the set null signup top on the display. Regards Laurence.

HI richard. Turns out the error 73 was a faulty supply earth to the tester itself.Disaster averted. Thanks to Tony our technical support for avo nz. New one for them as well.Shows us all to keep well grounded however successful we think we are! Regards laurence

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